Fireproof building construction



J. LALLY FIREPROOF BUILDING CONSTRUCTION April 26, 1927. 1,625,899

Filed May 17, 1923 5 Sheets-Sheet 1 IN VEN TOR WM A mwwgni ATTORNEY a1,625,899 Aprll 26, 1927. LALLY FIREPROOF BUILDING CONSTRUCTION FiledMay 17, 1925 3 Sheets-Sheet 2 ATTORNEY A ril 26 1927 p J. LALLYFIREPROOF BUILDING CONSTRUCTION 1923 3 Sheets-Sheet 3 Filed May 17 fiwolz WMZ M ATTORNE Patented Apr. 26, H3271.

UNITED STATES JOHN LALLY, O1 BOSTON, MASSACHUSETTS.

FIBEPBGOF BUILDING CONSTRUCTION.

Application filed May 17, 1923.

My invention relates to improvements in lire-proof building constructionand in particular to heads for columns to be used in reinforced concreteconstruction and it is my object to produce a column head which can beassembled. either on the job or in the shop, in which columns may besuperimposed with the head entirely GIHlDBClClQCblD the floor, savingvaluable space, and in which shearing strains will be more highlyresisted than in the present construction thereby affording greaterstrength with lightness and a minimum of metal.

In the drawing Fig. 1 is a view, partly in section, oil a steel tube,concrete tilled column provided with one form of my new head, incombination with a concrete floor slab; Fig. 2 is a top plan view of ahead embodying my invention; Fig. shows a modification ot the head ofFig. 1; Fig. 4; shows a further modification otthe head 01 Fig. 1; Fi 5shows a plan view ot a further modification of the metal parts ot thehead of Fig. 1; Fig. 6 shows a view, partly in section, of a furthermodification oi the head of Fig. 1; Fig. *5 top view of the metallicelements ot the structure of Fig. ll; Fig. 8 is a de tail view of theslotted sleeve used in the head of Figs. 1 and 2; Fig. 9 is a detailview of the floor plate used in the head of Fig. 1; and Fig. .10 is adetail view of a notched radial arm.

The present invention consists briefly in making a head ot radiallyextending structural steel, either in plate or T-beam form, and inarranging the floor reinforcing bars in such a way that they are tiedinto the head in such a way that shearing strains are reduced to aminimum.

In Fig. 1 the lower column 1 is of the Lall type composed 01? an outermetal shell and a concrete filling, and supports a crown plate 2, whichis tied in place by anchor bolts 3 extending through the plate and intothe concrete filling 1.

Radial arms 5, 6, 7 and 8 are provided with notches 9 in their upperedges in line with the base oi the upper column 10 which is providedwith a base plate 11. A slotted pipe 12 slips down over the notcheshlhng the space between the arms 5, 6, 7 and 8 and rests on the crownplate 2. When the head is assembled on top of the crown plate and theupper column is set in place bolts 18 pass through the plates 2 and 11between the arms and lock the head solidly in place be- Serial No.639,592.

tween the coluuiin ends. If desired the edges ol the arms 5, 6, 7, and 8may be welded to the crown plate and the faces of the arms to the pipeslots, and the bottom plate 11 of the upper column 10 may be weldedtogether.

Rectangular bars 1% are bent into circles, or other suitable form, andare laid on top of the radial arms, notches 15 for their reception beingpreferably formed in the upper edges oi the arms. These bars 14 areintended to resist shearing strains on the surrounding l'loor and toprevent cracking of the concrete at this point, which is generally thepart that has the greatest stress 0 lound bars 16 may also be runthrough the rad'al arms at their lower parts to act as web: to hold thefloor together making the entire head strong with little expense owingto the small amount 01" steel required by this method of construction.

The main floor carrying bars or reinforcements 1? entend from one columnhead to another with hook ends 18 passing over the bars 1 1 and areembedded in the concrete 18 forming the floor, the bars 14; resistingthe shearing strains and as they are in turn carried by the radial arms5, 6, 7 and 8 the construction results in greater strength than theordinary methods of concrete rein- 'lkircing.

in the structure of Fig. 3 the slotted piece of pipe shown in Fig. 8extending between the crown plate 2 and the base plate 11 has beenomitted and the arms 5, 6, 7 and 8 are welded together at theirjunction. This welding together of the brackets together with thebolting of the crown plate 2 to the base 11 holds the head solidly inposi' tion on the end of the column.

in the structure of Fig. 1 the arms 5, 6, 7 and 8 are formed of invertedT-loeams which enables the floor plate 19 (shown in Fig. 9) to rest onthe flanges 20 and be bolted thereto at 21. These floor plates extendfrom flange to flange of the radial arms thus making the head solid toreceive the floor slabs. The rectangular section bars ll and the roundbars 16 take care of shearing strains as in the structure of Fig. 1.Floor carrying bars 17 are used as in the structure of Fig. 1 and thebolts 13 passing through the plates 2 and 11 hold the head solidly inplace.

In the structure of Fig. 5 the anchor bolts 13 in the columns extendfrom the concrete filling beyond the end of the column and are threadedat their exposed ends. Holes are made in the flanges of the radial armsthrough which the anchor bolts pass so that by running home the nuts onthe threaded ends of the anchor bolts the radial arms and floor platesare solidly locked to the top of the column. This construction alsoemploys the rectan ular-section bars 17, floor plates 19 andreii'itorcenients 1% used in the structure of Fig. l.

In the construction shown in Figs. 6 and 7 the arms 5, 6, 7 and 8 passthrough slots in the column wall below its top end and the crown plate 2is anchored into the concrete filling by the tie bolts. This gives additional strength to the head as the arms 5, 6, 7 and 8 are held rigidlyin case of eccentric loads on the floor. The arms 5, 6, 7 and 8 arewelded together at their junction after they have been inserted in theslots and before the concrete filling has been poured. These arms mayhave notches in their upper edges as shown in Fig. 10 so that the crownplate 2 will restsolidly on the top edges of the radial arms. This typeof head can be advantageously used in semi-slab construction but isdeeper at the head than the rest 01' the floor giving additionalstrength in case of shearing loads at this point. Strength to almost anydesired degree can be obtained by Widening and lengthening the radialarms.

Fig. 7 shows the construction of Fig. 6 with the reinforcing bars 17laid thereunder.

As shown in Figs. 1 and 3 the column proper may be surrounded by fireresisting blocks provided with tongues and grooves in the upper andlower edges and clamped together at their vertical edges by clamps 23which lie inside the horizontal joints.

I claim 1. Fireproof building construction comprising a column, a crownplate secured to one end thereof, a plurality of radially extending armson said crown plate, a plurality of reinforcing rings on said arms, asecond plate on top of the arms and means for tying the plates and armstogether, the arms, rings and plates being adapted to be embedded inconcrete.

.2. Fireproof building construction comprising a column, a crown platesecured to one end thereof, a plurality of notched,

radially extending arms on said crown plate, a plurality of reinforcingrings in the notches on said arms, a second plate on top of the arms andmeans for tying the plates and arms together, the arms, rings and platesbeing adapted to be embedded in con crete.

3. Fireproof building construction C0l1l prising a column, a crown platesecured to one end thereof, a plurality of notched, radially extendingarms on said crown plate, a notched pipe engaging the arms with thenotches interlocking, a second plate on top of the arms and pipe andmeans for tying the arms, plates and pipe together, the whole beingadapted to be embedded in concrete.

it. Fireproof building construction comprising a column, a crown platesecured to one end thereof, a plurality of notched, radially extendingarms on said crown plate, a notched pipe engaging the arms with thenotches interlocking, a second plate on top of the arms and pipe, thearms, pipe and plates being welded together.

5. Fireproof building construction comprising a column, a crown platesecured to one end thereof, radially extending T-beam arms on said platesecured together and to the crown plate, 'tloor plates filling thespaces between the arms and secured to the T-bcam flanges, the wholebeing adapted to be embedded in concrete.

(3. .liireproo'l? building crmstruction co1nprising a column, a crownplate secured to one end thereof, a plurality oi radially extendingT-bcani arms on said plate secured together and to the crown plate,floor plates filling the spaces between the arms and secured to theT-beam flanges and a plurality oil rein'lorcing rings on the arms, thewhole being adapted to be embedded in concrete.

7. Fireproof building construction comprising a. column. a crown plateon one end thereof, a plurality of radially extending arms secured tosaid crown plate, a plurality ol reinforcing rings on said arms and aplurality of floor rod reinforcements each with a turned-down hook-likeend passing between the reinforcing rings and coucri-ite embedding thecolumn end, plate, rings, arms and rods.

In testimony whereof I have attired my signature.

JOHN LALLY.

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